WP_Query post__in from Custom Field

I am using a custom meta field (from RWMB Meta Plugin) to get a comma separated list of page IDs from a custom post type in order to use a custom loop and echo out these page values (title, excerpt etc).

But for some reason my code WILL NOT work. I can get the result of the first ID, but not the entire ID list.

Here is what I have

if ( rwmb_meta('farrlaw_practice_attorneys', true ) ) {
							$attorney_ids = rwmb_meta( 'farrlaw_practice_attorneys' );
							$attorney_ids_array = array( $attorney_ids );
						}

						$args = array(
							'post_type' => 'attorneys',
							'post__in' => $attorney_ids_array,
							'posts_per_page' => -1,
							'nopaging' => true
						);

						$loop = new WP_Query( $args );
						while ( $loop->have_posts() ) : $loop->the_post();
						    the_title();
						endwhile;
						wp_reset_query();